Water-cooled furnace door



A. W. HELLSTROM WATER-COOLED FURNACE DOOR Filed Oct. 18, 1943 Emmi, 1947.

2 S heets-Sheet l my may m gnz June 10, 1947 A. W. HELLSTROM WATER-COOLED FURNACE DOOR' Filed 001,. 18. 1943 2 Sheets-511991; 2

llll ll Ill Patented June 10, 1947 M WATER-000L121) FURNACE noon Arthur W. Hellstrom, Chicago, assignor to Kropp Forge Aviation 00., Cicero, 111., a corporation of Illinois Application October 18, 1943, Serial No. 506,790

1 My invention relates to a cooling syste forge furnaces.

for An object of my invention,

among others, is -to provide an'improved cooling system for forge furnaces to reduce the danger of intense heat of the fire of forge furnaces burning up the doors of the 'furnacesfletc. Another object of my invention is the provision of such improvements as will be simplein form, easy to assemble, and relatively inexpensive to construct'. i

Further objects and advantages will appear and be brought out more fully in the following of the water-circulating arrangement on the. line 33 of Fig. 1.

Fig. 4 is a front fragmentary perspective of the furnace, showing the brick supporting conduit across the front of the furnace.

Fig 5 is a detail section on the line 5-5 of Fig. 4. V r

Fig. 6 is adetail section on the line"66 of Fi 4. t

. 7 Claims. (01. 122-498) Referring more particularly to the drawings to illustrate the construction and operation of the preferred form of my invention, there is shown a forge furnace 4, having side walls 5 and a "door 6, the door in part being composed of four conduit elements 1, welded at the corners.

member 8, having a base 9, and sides l0 and II.

'There is welded to each channel member 8, a

The 1 conduit elements are each formed of a channel for assisting in holding the cement fillerof the Cement; fire-plate, or other refractory material {H is filled between the space formed by the outer plate 15, and the angle irons l4 and bevel l3 of the plate l2. When this cement, or other material hardens, it is firmly held in place by means of the angle irons l4 andouter plate l5 .on one side of the door, and by the bevel arrangement I3 on the other side of the door, with the cement, or fireplate facin the fire in the furnace.

2 l The door, thus, is adapted to be lifted "or lowered by cables I 9, operated by a cylinder, or other lifting means not shown. i

Water may be fed from pipes 20 and 2] into funnels 22 and 23, respectively, communicating with the conduit members in each door 6. Overflow-outlets 24 are provided, leading into overflow tanks 25, which lead to water-circulating cylinders 26, communicating with a circulating tank 21, which may, also, be supplied by the pipe 28, connected to a suitable source of supply. The circulating tank 21, also, may communicate with another water-circulating cylinder 29, communicating with another overflow tank 30; both of the overflow tanks 24 and 30 being preferably provided with discharge openings 3| and 32.

According to my invention, it will be seen that the doors are provided with conduits into which water may be fed and through which the cold water may be circulated constantly at asfast a rate as desired; the water itself may be-reused and not lost. The cooling effect of the speedily circulating cold water on the door frame will be at once apparent, and the advantages are so obvious, that they do not require further definition. It will be noted that there is no interference by my cooling systemwith the ordinary usual operation of the furnace doors. When the doors are raised, the pipes 20 and 2] (will extend within the funnels 22 and 23 and into the vertical conduit members 1, without any obstruction whatsoever. I have, also, provided a water-coolingreinforcing conduit 33 in the front wall of the furnace.. This conduit 33 has water supplied from an inlet pipe 34, and an outlet pipe 35 for discharging water. The outlet pipe 35 is connected on the top of the conduit to insure the tank being filled at all times. The outlet pipe 35 discharges into the tank 30 as shown.

The conduit 33 may be formed from a channel iron welded to a front plate 31. The conduit 33 may extend from oneside of the front wall across the face of the frontof the furnace to the other side and may be appropriately spot welded to the uprights and supported thereby. Thisfreinforcing conduit 33 supports the bricks and arch and will be prevented from warping by the constant circulation of the cold water. Its life wili,;also, be radically lengthened thereby against burning out.

It will, also, be understood that ,while I have shown in effect a combination of two cooling units in the furnace, it will only be necessary to have one of these units where a furnacehas only one door. It will be manifest from my invention that the former-disadvantage of the burning out of the door frames will be largely reduced, or e1iminated.

The foregoing structure has been tested out in actual commercial use, and has been found cut is:

3 to be a solution for preventing door warpage and destruction. j

WhileI have illustrated and described the preferred form of construction for carrying my invention into effect, I wish to emphasize that.

what I have shown is only one form -of many, which may be employed for carrying the invention into effect, and that the form which I have shown is capable of variation and modification,"

without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Pat- I 1. In a furnace, a door of refractory material having a hollow frame'for receiving water, said frame having ,a communicating funnel, water supply pipes for supplying water to said framaadapted to extend into the funnel and hollow frame *when the door is raised, an overflow tank, a; discharge \outlet for said frame extending to the lower part of aid tank, -a circulating tank communicating with said overflow tank, and a dis charge outlet for said structure.

:2. In a furnace, a door of refractory material having a hollow surrounding frame forming a conduit, an outer metal wall on the outside of said door, refractory material within said conduit on the furnace side of said door, said door conduit having funnels and water supply pipes,

adapted .to'extend into said funnels and conduit when the' door is ;raised, an overflow tank, an overflow pipe communicating with said conduit andsextending adjacent the bottomof said overflow tank, said tank having a discharge outlet, va water circulating conduit beneath said door communicating .with said overflow tank and a water-circulating tank communicating with said yvater-circulating conduit beneath the door.

.3. A furnace having a pair of doors, each door having a surrounding water conduit frame,

each-door having an outer metal wall on the outside of the door, refractory material within centthe bottom of said overflow tank, each ,tank having a discharge outlet, a water-circulating conduit beneath each door communicating with the overflow tank, and a water-circulating tank communicating with the' water-circulating conduits beneath the doors.

4. A furnace having a pair of doors, each door having a surrounding water conduit frame, each door having an outer metal wall on the outside of the door, refractory material within said conduit frame on the furnace side of said door, funnels communicating with said door conduit frame, water supply pipes adapted to extend into said funnels and conduit frames when the doors are raised, an overflow tank for each conduit frame, an overflow pipe communicating with each conduit frame and extending adjacent the bottom of said overflow tank, each tank having a discharge outlet, a water-circulating conduit beneath each door communicating with the overflow tank, a water-circulating tank communicating with the water-circulating conduits beneath the door, and means for supplying water to said water-circulating tank.

5. In a furnace having a fire-box, a front wall of refractory material with a fire-door opening therein, a door for said opening comprising a hollow surrounding frame adapted to contain a cooling agent with the ends of said frame extending upward above the door and open, said frame being larger than the said fire-door opening with the sides and top protected by refractory material of the said front Wall, the intermediate portion of said frame, exposed to the fire through the said opening, formed of refractory material supported in said frame, overflow tanks at the sides of said door, an overflow connection extending from the door frame to one of said overflow tanks, and means continuously supplying fluid to the ,door frame through the openings .of the frame above the door.

6. In a furnace' having a fire-box, a front wall of refractory material with a fire-door opening therein, a door for said opening comprising a'hollow-surrounding frame adapted tocontain a cooling agent with the ends of said frame extending .upward above the door and open, said frame being larger than the said fire-door opening with the sides and top protected by refractory material of .the said front wall, the intermediate portion of said frame, exposed to the fire through the said opening, formed of refractory material supported in said frame, fluid reservoirs positioned against the front Wall of said furnace and at the sides of said door, means feeding water to the said door frame, and means conveying water from the said door frame to the fluid reservoirs.

'7. In a furnace having a fire-box, a front wall ,of refractory material with a fire-door opening therein, a door for said opening comprising a hollowsurrounding frame adapted to contain a cooling agent with the ends of said frame extending upward .above the door and open, said frame ;being larger than the said fire-door opening with the sides'and top protected by-refractory material of the said front wall, the intermediate portion -of said frame, exposed to the fire through the said opening, formed of refractory material supported in said frame, fiuid reservoirs positioned against the front wall of said furnace and at the sides of said door, means feeding water to the said door frame, meansconveyingwater from the said door frame to the fluid reservoirs, and recirculatingtanks-associated with said reservoirs and .door.

ARTHUR W. HEIJLSTROM.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

